Data Collection Flashcards
Sampling Frame
population of interest
Cross-Sectional Survey
gathers information about a population at a single point in time
longitudinal survey
survey over over a period of time.
Ex: satisfaction survey completed every few years
Types of Surveys
Written Group-administered Drop-off Oral Phone Online
Written Survey
Mailed, printed in a newspaper, or administered in a group setting to obtain information from a broad audience. Advantages: low cost, respondents can complete at their own leisure. Disadvantages: low response rate, participants must be able to read and write
Group- Administered Survey
Specific population to target. Advantages: high & quick response rate. Disadvantages: must get everyone together at one time to complete, small sample size. Ex: End of class survey
Drop-off Survey
Survey dropped off at a residence or business. Advantages: Participants free to respond at their leisure, higher response rate because of contact at drop-off. Disadvantages: expensive because of time to distribute survey & smaller sample size.
Oral Survey
Administered on phone or in person orally
Phone Survey
Ask survey questions over the phone. Usually yes/no questions. If a live person administering the survey, the interviewer can ask follow up questions. Advantages: ability to ask follow up questions. Disadvantages: response rate unpredictable, can be more expensive than mail or internet, bias can be introduced because of interaction with interviewer.
Online Survey
Popular survey method conducted via email, website or text message. Advantages: quick response, inexpensive. Disadvantages: can introduce bias because leaves out people who do not have internet.
Survey design considerations
Short, clear \, easy to answer questions
Each question contains 1 issue
Avoid negatives
Avoid biased items and terms
Consistent response method - consistent scale or yes/no answers
Sequence questions from general to specific
Define unique or unusual terms
Sample Design
Should represent the population about which information is being gathered
Probability sampling
Direct mathematical relation between sample and population from which precise conclusions can be drawn
Random sampling
Everyone has a chance of being selected to participate in the survey
Stratified sampling
Population divided into separate groups or classes from which a sample is drawn such that the classes in the population are represented by the classes in the sample. Ex: electoral surveys